基于裕度介数和转移裕度熵的电网关键薄弱线路识别方法

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Abstract In order to quickly and accurately identify the explicit and implicit critical lines in power grid, according to the placement of the line in power grid topology and power flow transfer in real-time operation, considering the static flow margin and dynamic flow transfer margin, a critical power lines identification method based on margin be-tweenness of power flow and margin entropy of power flow transfer is proposed, and the critical line evaluation index is presented. Compared with existing critical power line evaluation method, the proposed method and evalua-tion index not only can find out the static explicit vulnerability of power lines in power network topology, but also identify the dynamic implicit vulnerability of power lines in power flow transfer due to removal of some components. Simulation results on IEEE-30 bus system shows that the method proposed in this paper can effectively identify the key and vulnerable line of power grid.

Key words： static explicit criticalness and vulnerability dynamic implicit criticalness and vulnerability weighted power flow margin betweenness power flow transfer margin entropy power flow transfer betweenness entropy

Received: 27 June 2019 Published: 27 February 2020

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	Articles by authors
	Wu Ling
	Liu Shangwei
	Gao Zhenyan
	Zhao Ruifeng
	Pan Kaiyan

Cite this article:

Wu Ling,Liu Shangwei,Gao Zhenyan等. Identification of critical and vulnerable components in power grid based on margin betweenness of power flow and margin entropy of power flow transfer[J]. Electrical Engineering, 2020, 21(2): 15-21.

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https://dqjs.cesmedia.cn/EN/Y2020/V21/I2/15

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